RM35X0E _59 Vehicle Exterior _079256 LIGHTING (EXT) _0396321 LIGHTING SYSTEM(w/ Headlight ECU) C

LIGHTING (EXT)  LIGHTING SYSTEM(w/ Headlight ECU)  B2439  Headlight LH Circuit  B243A  Headlight RH Circuit  


DESCRIPTION

The headlight ECU sub-assembly LH and headlight ECU sub-assembly RH internally boost the power supply voltage to ensure a constant supplied current for the Lo/Hi beam LED of their respective headlight.

By monitoring the LED power supply voltage, abnormal current and malfunctions can be detected.

DTC No. Detection Item DTC Detection Condition Trouble Area DTC Output from Note
B2439 Headlight LH Circuit
Detection condition:

All of the following conditions are met:

-

Engine switch on (IG)

-

Low beam headlights on



Malfunction status:
·

Headlight LED unit assembly malfunction

·

Open/short in Lo/Hi beam circuit


Malfunction duration:

10 seconds or more


·

Headlight sub-assembly LH

·

Headlight unit assembly LH

·

Headlight ECU sub-assembly LH


HL AutoLeveling -
B243A Headlight RH Circuit
Detection condition:

All of the following conditions are met:

-

Engine switch on (IG)

-

Low beam headlights on



Malfunction status:
·

Headlight LED unit assembly malfunction

·

Open/short in Lo/Hi beam circuit


Malfunction duration:

10 seconds or more


·

Headlight sub-assembly RH

·

Headlight unit assembly RH

·

Headlight ECU sub-assembly RH


HL AutoLeveling (Sub) -

WIRING DIAGRAM

E333074E48
0.229,3.271 2.271,3.583 2.042,0.313 10 false Headlight ECU Sub-assembly 3.094,2.938 4.74,3.375 1.646,0.438 10 false Headlight Unit Assembly 4.594,2.448 6.76,2.688 2.167,0.24 10 false Headlight Sub-assembly 5.49,1.469 6.573,1.76 1.083,0.292 10 false Lo/Hi Beam 1.552,1.219 1.771,1.417 0.219,0.198 10 false 2 1.552,1.615 1.771,1.833 0.219,0.219 10 false 3 4.448,1.219 4.604,1.417 0.156,0.198 10 false 1 4.448,1.625 4.604,1.823 0.156,0.198 10 false 2 4.594,2.271 4.75,2.469 0.156,0.198 10 false C 0.219,3.125 0.375,3.323 0.156,0.198 10 false B 0.927,1.313 1.615,1.542 0.688,0.229 10 false LOLED2 0.927,1.719 1.615,1.948 0.688,0.229 10 false LOLED1

CAUTION / NOTICE / HINT

NOTICE:
·

If the headlight ECU sub-assembly LH has been replaced, it is necessary to synchronize the vehicle information and initialize the headlight ECU sub-assembly LH.

Click hereVehicle Exterior>LIGHTING (EXT)>LIGHTING SYSTEM (w/ Headlight ECU)>INITIALIZATION

·

When replacing the headlight ECU sub-assembly LH, always replace it with a new one. If a headlight ECU sub-assembly LH which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.



PROCEDURE

1.CLEAR DTC
a.

Connect the GTS to the DLC3.


b.

Turn the engine switch on (IG).


c.

Turn the GTS on.


d.

Enter the following menus: Body Electrical / HL AutoLeveling or HL AutoLeveling (Sub) / Trouble Codes.


e.

Clear the DTCs.

Body Electrical > HL AutoLeveling > Clear DTCs
50002 361
Body Electrical > HL AutoLeveling (Sub) > Clear DTCs
50002 414

Result:
Proceed to
NEXT



NEXT

2.CHECK FOR DTC
2.CHECK FOR DTC
a.

Connect the GTS to the DLC3.


b.

Turn the engine switch on (IG).


c.

Operate the light control switch to turn on the low beam headlights and wait 10 seconds or more.


d.

Turn the GTS on.


e.

Enter the following menus: Body Electrical / HL AutoLeveling or HL AutoLeveling (Sub) / Trouble Codes.


f.

Check for DTCs.

Body Electrical > HL AutoLeveling > Trouble Codes
50001 361
Body Electrical > HL AutoLeveling (Sub) > Trouble Codes
50001 414
OK:

DTC B2439 and B243A are not output.



Result:
Result Proceed to
OK A
NG (DTC B2439 is output) B
NG (DTC B243A is output) C



A

USE SIMULATION METHOD TO CHECK

Click hereGeneral>INTRODUCTION>HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS>HOW TO PROCEED WITH TROUBLESHOOTING


B

3.CHECK HEADLIGHT UNIT ASSEMBLY LH

C

7.CHECK HEADLIGHT UNIT ASSEMBLY RH
3.CHECK HEADLIGHT UNIT ASSEMBLY LH
a.

Interchange the headlight unit assembly LH with RH and connect the connectors.

Click hereVehicle Exterior>LIGHTING (EXT)>HEADLIGHT ASSEMBLY (for LED Headlight)>DISASSEMBLY


Result:
Proceed to
NEXT



NEXT

4.CLEAR DTC
4.CLEAR DTC
a.

Connect the GTS to the DLC3.


b.

Turn the engine switch on (IG).


c.

Turn the GTS on.


d.

Enter the following menus: Body Electrical / HL AutoLeveling or HL AutoLeveling (Sub) / Trouble Codes.


e.

Clear the DTCs.

Body Electrical > HL AutoLeveling > Clear DTCs
50002 361
Body Electrical > HL AutoLeveling (Sub) > Clear DTCs
50002 414

Result:
Proceed to
NEXT



NEXT

5.CHECK FOR DTC
5.CHECK FOR DTC
a.

Connect the GTS to the DLC3.


b.

Turn the engine switch on (IG).


c.

Operate the light control switch to turn on the low beam headlights and wait 10 seconds or more.


d.

Turn the GTS on.


e.

Enter the following menus: Body Electrical / HL AutoLeveling or HL AutoLeveling (Sub) / Trouble Codes.


f.

Check for DTCs.

Body Electrical > HL AutoLeveling > Trouble Codes
50001 361
Body Electrical > HL AutoLeveling (Sub) > Trouble Codes
50001 414

Result:
Result Proceed to
DTC B2439 is output A
DTC B243A is output B



A

REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH

Click hereVehicle Exterior>LIGHTING (EXT)>HEADLIGHT ECU>REMOVAL


B

6.INSPECT HEADLIGHT UNIT ASSEMBLY LH
6.INSPECT HEADLIGHT UNIT ASSEMBLY LH
E419175C01
1.708,0.354 2.073,0.656 0.365,0.302 4.844,0.417 5.208,0.719 0.365,0.302 1.052,2.125 1.458,1.448 true 1.708,2.156 1.583,1.458 true 0.615,0.438 0.927,0.635 0.313,0.198 10 false *a 4.115,0.469 4.427,0.667 0.313,0.198 10 false *b 1.854,0.417 2.167,0.615 0.313,0.198 10 false B 4.969,0.51 5.281,0.708 0.313,0.198 10 false C 1.677,2.219 2.354,2.438 0.677,0.219 10 false LOLED1 0.542,2.188 1.219,2.406 0.677,0.219 10 false LOLED2
*a Component without harness connected
(to Headlight ECU Sub-assembly LH) 		*b Component without harness connected
(to Headlight Sub-assembly LH)


a.

Remove the headlight assembly LH.

Click hereVehicle Exterior>LIGHTING (EXT)>HEADLIGHT ASSEMBLY (for LED Headlight)>REMOVAL


b.

Remove the headlight sub-assembly LH.

Click hereVehicle Exterior>LIGHTING (EXT)>HEADLIGHT ASSEMBLY (for LED Headlight)>DISASSEMBLY


c.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
Tester Connection Wiring Color Condition Specified Condition
B-2 (LOLED2) - C-1 G Always Below 1 Ω
B-3 (LOLED1) - C-2 L Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

REPLACE HEADLIGHT SUB-ASSEMBLY LH

Click hereVehicle Exterior>LIGHTING (EXT)>HEADLIGHT ASSEMBLY (for LED Headlight)>DISASSEMBLY


NG

REPLACE HEADLIGHT UNIT ASSEMBLY LH

Click hereVehicle Exterior>LIGHTING (EXT)>HEADLIGHT ASSEMBLY (for LED Headlight)>DISASSEMBLY


7.CHECK HEADLIGHT UNIT ASSEMBLY RH
a.

Interchange the headlight unit assembly RH with LH and connect the connectors.

Click hereVehicle Exterior>LIGHTING (EXT)>HEADLIGHT ASSEMBLY (for LED Headlight)>DISASSEMBLY


Result:
Proceed to
NEXT



NEXT

8.CLEAR DTC
8.CLEAR DTC
a.

Connect the GTS to the DLC3.


b.

Turn the engine switch on (IG).


c.

Turn the GTS on.


d.

Enter the following menus: Body Electrical / HL AutoLeveling or HL AutoLeveling (Sub) / Trouble Codes.


e.

Clear the DTCs.

Body Electrical > HL AutoLeveling > Clear DTCs
50002 361
Body Electrical > HL AutoLeveling (Sub) > Clear DTCs
50002 414

Result:
Proceed to
NEXT



NEXT

9.CHECK FOR DTC
9.CHECK FOR DTC
a.

Connect the GTS to the DLC3.


b.

Turn the engine switch on (IG).


c.

Operate the light control switch to turn on the low beam headlights and wait 10 seconds or more.


d.

Turn the GTS on.


e.

Enter the following menus: Body Electrical / HL AutoLeveling or HL AutoLeveling (Sub) / Trouble Codes.


f.

Check for DTCs.

Body Electrical > HL AutoLeveling > Trouble Codes
50001 361
Body Electrical > HL AutoLeveling (Sub) > Trouble Codes
50001 414

Result:
Result Proceed to
DTC B243A is output A
DTC B2439 is output B



A

REPLACE HEADLIGHT ECU SUB-ASSEMBLY RH

Click hereVehicle Exterior>LIGHTING (EXT)>HEADLIGHT ECU>REMOVAL


B

10.INSPECT HEADLIGHT UNIT ASSEMBLY RH
10.INSPECT HEADLIGHT UNIT ASSEMBLY RH
E419175C01
1.708,0.354 2.073,0.656 0.365,0.302 4.844,0.417 5.208,0.719 0.365,0.302 1.052,2.125 1.458,1.448 true 1.708,2.156 1.583,1.458 true 0.615,0.438 0.927,0.635 0.313,0.198 10 false *a 4.115,0.469 4.427,0.667 0.313,0.198 10 false *b 1.854,0.417 2.167,0.615 0.313,0.198 10 false B 4.969,0.51 5.281,0.708 0.313,0.198 10 false C 1.677,2.219 2.354,2.438 0.677,0.219 10 false LOLED1 0.542,2.188 1.219,2.406 0.677,0.219 10 false LOLED2
*a Component without harness connected
(to Headlight ECU Sub-assembly RH) 		*b Component without harness connected
(to Headlight Sub-assembly RH)


a.

Remove the headlight assembly RH.

Click hereVehicle Exterior>LIGHTING (EXT)>HEADLIGHT ASSEMBLY (for LED Headlight)>REMOVAL


b.

Remove the headlight sub-assembly RH.

Click hereVehicle Exterior>LIGHTING (EXT)>HEADLIGHT ASSEMBLY (for LED Headlight)>DISASSEMBLY


c.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
Tester Connection Wiring Color Condition Specified Condition
B-2 (LOLED2) - C-1 G Always Below 1 Ω
B-3 (LOLED1) - C-2 L Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

REPLACE HEADLIGHT SUB-ASSEMBLY RH

Click hereVehicle Exterior>LIGHTING (EXT)>HEADLIGHT ASSEMBLY (for LED Headlight)>DISASSEMBLY


NG

REPLACE HEADLIGHT UNIT ASSEMBLY RH

Click hereVehicle Exterior>LIGHTING (EXT)>HEADLIGHT ASSEMBLY (for LED Headlight)>DISASSEMBLY